package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    @Override
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 添加员工
     *
     * @param employeeDTO
     * @return
     */
    @Override
    public void insert(EmployeeDTO employeeDTO) {
        // 创建员工表对象
        Employee employee = new Employee();
        // 拷贝对象到员工表
        BeanUtils.copyProperties(employeeDTO, employee);
        // 设置密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        // 设置状态，默认正常
        employee.setStatus(StatusConstant.ENABLE);
        // 设置创建时间和更新时间
        // employee.setCreateTime(LocalDateTime.now());
        // employee.setUpdateTime(LocalDateTime.now());
        // 设置创建人和修改人id
        // employee.setCreateUser(BaseContext.getCurrentId());
        // employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询员工数据
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        // 设置分页参数
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        // 获取查询的列表数据
        List<Employee> employeeList = employeeMapper.page(employeePageQueryDTO);
        // 存储到分页里面
        Page<Employee> page = (Page<Employee>) employeeList;
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 启用禁用员工账号
     *
     * @param status
     * @param id
     */
    @Override
    public void updateStatus(Integer status, Long id) {
        Employee employee = Employee.builder()
                .status(status)
                // .updateUser(BaseContext.getCurrentId())
                // .updateTime(LocalDateTime.now())
                .id(id).build();
        employeeMapper.updateStatus(employee);
    }

    /**
     * 根据id查询员工
     *
     * @param id
     * @return
     */
    @Override
    public Employee getEmployeeById(Long id) {
        return employeeMapper.getEmployeeById(id);
    }

    /**
     * 编辑员工信息
     *
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        // 拷贝传过来的信息到employee
        BeanUtils.copyProperties(employeeDTO, employee);
        // 修改时间和修改人
        // employee.setUpdateTime(LocalDateTime.now());
        // employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateStatus(employee);
    }

    /**
     * 根据id删除员工信息
     * @param id
     */
    @Override
    public void delete(Long id) {
        employeeMapper.delete(id);
    }
}
